Mill for grinding grains.



v 3 WITNESSES.-

J BEALL.

MILL FOR GRINDING GRAINS. I APPLIoATIm FILED 817F116, 190s. RENEWED MAR.15, 1912.

Patented Oct. 22, 1912.

I3 I a I761 L i INVENTOK. Joiaz UhllflED STATES "PATENT @FlilQE;

JOHN BEALL, OF DECATUR. ILLINOIS,

MILL FOR GRINDING. GRAINS.

Application filed September 16. 1908. Serial No. 453.293. Renewed To allwhom it may concern:

3e it. known that l, Jenn Beau a citizen of the United States, andresident of Decatur, Macon county, State of Illinois, have inventedcertain new and usetullmprovements in Mills ior Grinding Grains; and mypreferred manner of carrying out the invention is set forth in thefollowing full, clear, and exact description, terminating with a clailnparticularly specifying the novelty. I

This invention relates to that type of mills which are used in thegrinding of corn or oats either mixed or separated and the etticientcrushing of the same. To this end the invention contemplates a simple,practical and etfeetive construction of a grinder roller and a feedplate therefor, possessing special utility in combination with a feedfor mills and the regulation of same.

lYith these and other objects in "low, which will readily appear tothose skilled in the art as the nature of the invention is betterunderstood, the same consists in the novel construction, combination andar rangement of parts hereinafter more fully described, illustrated andclaimed.

The essential features of the invention involved is the mounting of aroller of suitable material either iron or emery on a shaft in such amanner as to prevent its movement thereon, the mounting of the shaft androller on a standard with relation to a mill plate as to allow tor theentering of the grain and forcing of the same into teeth on the plateand against the roller.

ln the drawings Forming a part of this specification. Figure l is anehvation of the grinding roller and mill-plate or concave in operativerelation therewith; Fig. 2 an elevation of the grinding mill with theframe and hopper in section; and Fig. 3 is a side view of one end of thegrinding roller, its irregular surface being indicated at two placesthereon.

The numeral 1 represents the roller which is or may be made of anymaterial, preterably of carborumlum or emery, built on a shaft. 2, saidshaft 2 being provided with an enlarged portion integral therewith {is3, which'runs the full length ot-the roller 2 and which is provided withlongitudinal grooves or recesses as 4; these recesses 4 run the fulllength of said enlargement P, and in the formation of the rollersthereon the material is first made to enter the grooves 4 andSpecification of- Letters Patent.

Patented out. 22, in to; March 15, 1912. Serial No. 684,009.

thence around the enlargement 3 the grooves and said enlargement beingwithin the" roller and the same is thus prevented from rotating on theshaftand is made stationary therewith, making it possible to holdtheroller against the force of grain grinding, and to adjust the othermechanisms to a. fixed fineness for grinding grain.

The outer exterior surface of the roller .l as at 5 is rough and unevencontaining miscellaneous grooves, notches or depres sions located atuncertain periods thereon.

A mill-plate or concave 6 having a smooth exterior surface, is mountedadjacentthe roller 1 in the retainer plate 15 which it fits snugly, theinner face of the concave being eccentric to the roller and lying closeto it at its lower end. The head 8 of the concave has a smooth unbrokeninner face 8',

which. is separated a suitable distancefrom the roller to form an inletmouth for grain to be ground. The inner face 8 of the head S of theconcave is in line with the rear outlet' wall 12* of the hopper 13through which 30 wall projects a cut-off plate 17 The inner side of theconcave curves from the smooth face 8 down one side and beneath theroller 1, gradually approaching the surface of the roller as stated. thesurface 8, the inner face of the concave is provided with a number ofridges extending across the same parallel to the axis of the roller 1,decreasing in Width From the lower limit of 5 from the head 8 to theltiwer end of the concave. At the upper end of the concave the ridgespresent a broad face to the roller, which gradually decreases in widthto about a point l0 where the sides of said ridges are of equal length,but as they approach the outlet end of the concave the opposite sides ofsaid ridges become longer and resemblc saw-teeth in cross-section. Asthus formed the teeth serve to crush the grain when it first entersbetween the roller and the concave, being gradually reduced in thismanner as it works its way down toward the outlet and finally coming incontact with the sharp or saw teeth 11, the reduction of the grain isfinished.

ln operation, the roller 1 on shaft 2 is mounted in a suitable manner ason frame 16 with av receiver hopper l3 and in conjunction therewith; thefeed 12 is regulated by set screw 17 operating a bar 17 which movesslid- 11o from the or member 19 onto which is placed stationarytherewith, the

mill plate or concave 6; said member 19 is pivotally attached to theframe 16 as at 20, and is raised and lowered by means of a set screw 18,said tension being regulated according to the distance interveningbetween the roller and the concavity of the mill plate 6, thisincreasing or decreasing of the friction governing the coarseness orfineness of the grinding, and adjusts the. said plate and roller.Further, the grain, whether it be oats and corn (and applicant'knows ofno similar grinder that can be like effective on corn and oats) passeselevator into the hopper 13, thence downward through opening 12 againstthe roller 1 which rotates in the direction indicated by'the arrow anddirectly against the smooth face 8 of the plate 6 by means of the wall12 and fills the space that the11.exists between said plate and roller,then passes downward along the facets to the teeth as at 9 and is therecaught below the teeth, where it is cracked, crushed or broken coarsely,and is then drawn down into the next succeeding tooth by the roughnessof the face of the roller, and said teeth preventing the rise of thegrain due to the velocity of the -roller and as the teeth grow shorterand the grain is forced into them it is ground fine, is taken by thereverse teeth as 11 and then the grinding is complete. The object of theface 8 of the mill plate 6 is to allow the grain a chance to feed intothe roller and teeth and be caught by the raising surface of the rollerto prevent bach Ward or upward movement, and at the same time, notretard the grain.

What I claim as new is,

A grinding machine comprising a roller having a concentric roughenedperipheral surface formed by short irregularly disposed grooves andshallow depressions therein, a concave in eccentric relation to theperiphery of said roller provided on its working face with a pluralityof angular ridges each having a ting edges of the ridges at the upperend of the concavefacing in the opposite direction to those at the lowerend of the concave and intermediate ridges having their sides of' equallength and inclination with respect to the axes of said ridges.

In testimony whereof, I have hereunto subscribed my signature, this 25thday of August A. D. 1908.

JOHN BEALL.

Witnesses:

FRANK J. TEMPLE, JOHN L. WADDELL.

cutting edge, the cut-

